27 September 2010 to 1 October 2010
CSIR Convention Centre
Africa/Johannesburg timezone

Pulsation instability in Young Brown Dwarfs

Not scheduled
CSIR Convention Centre

CSIR Convention Centre

CSIR, Pretoria
Presentation Track D1 - Astrophysics

Speaker

Mr Geoffrey Okeng'o (Department of Physics, University of Western Cape and South African Astronomical Observatory)

Description

We use a time-dependent model of turbulent convection which includes turbulent pressure, turbulent diffusion and turbulent viscosity to study stellar pulsations in young brown dwarfs recently proposed by Palla and Baraffe (2005). We find that turbulent pressure dominates in driving the oscillations with growth rates much higher than frozen-in approximation.

Primary author

Mr Geoffrey Okeng'o (Department of Physics, University of Western Cape and South African Astronomical Observatory)

Co-author

Dr Enrico Olivier (South African Astronomical Observatory and Department of Physics, University of Western Cape)

Presentation Materials

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